Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following {Assume negligible air friction} (a) Time taken by them to reach the earth's surface will be independent of the properties of their materials. (b) Insulating ball will reach the earth's surface earlier than the metal ball. (c) Both will reach the earth's surface simultaneously. (d) Metal ball will reach the earth's surface earlier than the insulating ball.

Answer: (c). The only magnetic field present is the Earth's field, which is practically uniform over the ball's path. The flux through any part of the metal ball hardly changes, so eddy currents (and their drag) are negligible. Both balls fall with acceleration g from the same height. So both reach the ground simultaneously, answer (c).

Spherical insulating ball and a spherical metallic ball of same size… | MHT CET 2026 (13 Apr, Shift 2)

Q4MHT CET 2026 · 13 APR · SHIFT 2Easy

Lenz's Law, Eddy Currents & Induced Electric Field

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following {Assume negligible air friction}

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Answer: (c)

The only magnetic field present is the Earth's field, which is practically uniform over the ball's path.
The flux through any part of the metal ball hardly changes, so eddy currents (and their drag) are negligible.
Both balls fall with acceleration $g$ from the same height.
So both reach the ground simultaneously, answer (c).

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Lenz's Law, Eddy Currents & Induced Electric Field question from MHT CET 2026 (13 Apr, Shift 2)

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